Granted Patent
Utility
US 4,289,907 · App. 06/107,537
Process for preparing N-alkyl-nitroanilines
Inventor:
John K. Chan
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Dec 27, 1979
Inventor
John K. Chan
Assignee (at issue)
Union Carbide Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.